feat: add sandbox

hooks/useSSE.ts

@@ -0,0 +1,20 @@
+import { useEffect } from "react";
+
+export const useSSE = (url: string, onData: (data: any) => void) => {
+  useEffect(() => {
+    const sse = new EventSource(url, { withCredentials: true });
+
+    sse.onmessage = (e) => {
+      onData(JSON.parse(e.data));
+    };
+
+    sse.onerror = () => {
+      console.log("err!");
+      sse.close();
+    };
+
+    return () => {
+      sse.close();
+    };
+  }, [url]);
+};